Objective To clarify the CT criteria for encephalitic stage and enveloped stage of brain abscess.

目的明确脑脓肿脑包膜CT分标准。

Results The encephalitic stage was characterized by prominent perivascular cuffing.In enveloped stage, five distinct histological zones were seen.

果脑以“血管"为镜下特征，包膜表现为5个独特的组织学区带。